Apparatus for heating solder



Oct. 8, 1929. w. B. ROBERTSON I APPARATUS FOR HEATING SOLDER Filed Nov. 19, 1926 4 sheet ssheet 1 INVENTOR M ATTORNEY Oct. 8, 1929, w. B. ROBERTSON 1,730,591

APPARATUS FOR HEATING SOLDER Filed Nov. 19. 1926 4 Sheets-Sheet 2 Mn 1 I. M

. I WI HH 4m ATTORNEY Oct. 8, 1929. w. B. ROBERTSON 1,730,591

- I APPARATUS FOR HEATING SOLDER Filed. Nov. 19, 1926 4 Sheets-Sheet 5 INVENTOR William Brziizkfioerfwan M ATTORNEY Oct. 8, 1929. w. B. ROBERTSON I 1,730,591

' APPARATUS FOR HEATING SOLISER Filed Nov. 19, 1926 4 Sheets-Sheet 4 &

INVENTQR k? BElZzar/z Beddz'elioberfmn BY M ATTORNEY Patented Oct. 8, 1929 IT-EiD STATES wig-1mm BEDDI-E no'nnn'rson, or snaivena GHINQ, ASSIGNOR T0 STANDARD OIL COMPANYOF NEWYQRK, on NEW YORK, ;l T.-Y., Aconnona'rron or Your:

APPARATUS roe marine screen Application fi1ed November 1.), 1935. serial N 149,424,

The present invention relates to soldering machines and-more particularly to amethod and apparatus for heating solder in elongated pots.

Heretoforein the artit has been customary in heating theiron pots, containing solder for use in soldering-the topsand bottoms of tin cans, toiu se a number of open kerosene oil burnersloca-tedat intervals along the length of the pot. Such apparatus is expensive to operatefirst because of-the high cost of kerosene as compared with the low cost of fuel such as {fuel oiland secondly because of the waste .of heat occasionedby a multiplicity of open burners.

The present invention eliminates these objections by mountinglthe solder pot upon a I suitable furnace whic-hmay comprise a casing .for .enclosingthe space about the lower side of the pot and-for directing'the gases from the burner along thepot. The casing preferably is enclosed by suitable ,heatinsulating material such as fire brick. A single burner adapted toburn lowgrade Oll such as fuel 011, is

mounted at one end ofthe furnaceto direct a flame alongthe bottom of the soldering pot and by reason of the-confinement and direction of the. gases the solderis uniformly heated throughoutthelength of-thepot forapplication to containers. The properoperation of the burners with thisniore or less Viscous fuel is assured byutilizing thefurnacegases --to heatthe fuel oil sufficiently to permititto An object of the invention isto reduce the burners and the fuel consumption thereof to a minimum in heatingsol'der for top and bottom soldering machines.

Another object of the inventionis to utilize a low grade offuel, preferably a by -product of petroleum refineries, in the heating of sol- 'der pots for use in top and bottom soldering -machines, thereby decreasing the cost of. fuel therefor.

A further object of theiinvention is tolassure the proper operation-of ainumber of .ironcasing gcompr sing two castings L5 and burners from a single supply of fueloil by Otheran d furtherobjects of the invention will-be. obv ousupon an understanding of the preferredembodiment.aboutto be described, or will .be indicated inthe appended claims, and nany adyantages other than those herein specifically referred .tolwill ocean-to one skilled in the art upon,employmentof the invention inpractice.

A preferred embodimenthas been chosen for purposes of illustration ,and description, andis shown in the. accompanying drawings, wherein 1 is a side elevationalview of a group of furnaces, showing the burners operatively connected .to a reservoir through which the .fuel gasesare by-passed for heating same; if

Rig. 2 is a sectional View along. the: line 22 of Fig. 1 giving a plan viewiof a pairoffura esr ab y fo ibottorn Sol e nseam a sectional yiew. of a pair for solderingtops on the containers; i

3 is anend elevation-a1 iew taken V-from-the-righ-t endof Fig. l; i

-Fig.., 4-is a sectional view-taken along the vline -.4-,.4l of Fig. 2 illustrating details of the furnace; V l I I Fig. 5 is a sect ional View along the line .5-5 ofFig. :2 illustrating theform of soldering pots =together with the associated supporting ,members i Fig-5 is an elevational View ofthe pre- -ferred form of burner assembled Fig. 7 is a longitudinal sectional iew showing the parts efthe: burner proper, and

M8 ;is ,a longitudinal sectional lview showing detailsioftheshield.,

Referring: to the drawings, there is shown a group I of furnaces four in number, which are suitable {for .a dou ble ltopgand bottom soldering machine. Preferably the first pair of furnaces 1 are forsoldering the top the chimney.

6, extending longitudinally of the furnace and supported in upright position to seat the outwardly flared portions 7 of the solder pot 8 on the upper edges thereof. The lower edges of the castings and 6 have inwardly extending flanges forming the shoulders 9 adapted to seat the arched supporting members 10 thereon. These members preferably are cast and have two legs 11 adapted to rest on the shoulders 9 with an upper horizontal portion 14. An arched web 15 is formed between two legs to give additional strength to these members which are disposed at intervals along the bottom of the solder pot to supplement the support ing action of the upper edges of the casing 4 and in addition to hold the latter firmly in position. Preferably about six of these are utilized.

The casing 4 is mounted upon the upper part of the furnace and the lower part thereof is enclosed by suitable heat insulating material such as fire brick 16, preferably laid in fire clay. A flue 18 is provided having a floor 19 also of fire brick, with the sides thereof recessed to provide supporting shoulders 20 for the casing 4. A pair of angle irons 21 extend longitudinally of the top of the furnace in contact with the outer sides of the casmg 4 and are bolted thereto by'means of the stove bolts 24 securely to hold the casing in position. The ends of the casing 4 may be partially enclosed by means of the castings For economy and convenience, the portions of the furnaces 25 removed from the flue may be formed from ordinary brick laid in lime-cement mortar.

The floor of the flue (see Figs. 1, 4 and 5) is graded at the rear end thereof as shown at 27 to direct and to confine the gases adjacent the soldering pot. When the gases reach the on d of the pot they are directed outwardly in a' horizontal direction into the adjacent chimney shaped extension 33 and upwardly into the pipe 29 leading from the extension to the flue 30 common to all of the furnaces. A reservoir 31 for fuel oil is mounted on a platform 32 above the flue 30 and a by-pass 35 runs upwardly through the longitudinal center of the reservoir and is extended outwardly from the top thereof horizontally to join the pipe 36 leading from the flue 30 to Suitable dampers 37 and 38 are mounted in the pipe 36 and bypass 35, respectively, and are provided with adjustable weights 39 and 40 adapted to move the dampers in opposition to the springs 41 and 42 to control the temperature of the fuel oil in accordance with the weights attached to the respective dampers.

At the front end of each furnace there are burners 45 preferably of the form described hereinafter, and these burners are connected to the conduit 47 leading from the reservoir of oil through the burners and the temperature of the respective furnaces and solder pots are controlled by means of the valves 51. Compressed air may be furnished the burners through pipes 49 and controlled by valves 50.

Because of the fact that fuel oil, which is contemplated in the use of the present apparatus, is quite viscous when cold, there is provided herein a supplemental supply of oil in the tanks 52 of lighter grade which is connected to the burners through the check valves 55, pipes 56, check valves 57 and branch pipes 48. In starting the apparatus the burners are supplied with oil from the auxiliary tanks 52 until the line gases, pass ing through the pipe 35, heat the fuel oil in reservoir 31 to the proper operating temperature.

lVhile it is not desired to limit the broad concept of the present invention to any type V provided on the jet with screw threads 64 extending above the shoulder to accommodate a member 65 threaded thereon and forming a chamber 66 surrounding the fuel jet. The upper end of the member 65 is threaded to receive a plug 68 which, when screwed into the end of the member 65, substantially closes the upper end of the chamber 66 leaving a very narrow annular aperture 69 for the emission of air about the end of the jet. A suitable threaded aperture 70 may be pro- 'vided in the side of the member 65 to facilitate the attachment of a tube, such as the pipe 49, leading to a compressed air supply. shield 7 2 having apertures for admission 'of additional air to mix with the carburetted gases is mounted about the end of the fuel et by telescoping the aperture 7 8 in the base thereof about the conical portion of the member 65. The aperture 7 3 at the upper end of the shield and the apertures 7 4 in the side thereof afford suitable flame apertures for the burner. I

In the operation of the burner, fuel oil is '7 furnished through the passage 61, preferably though not necessarily it is moved by vacuum through the narrow. opening 79 at the end thereof. Compressed air is admitted into the shield 72 through the annular outlet 69 between the jet 60and the member 68. The air rushing through this narrow annular passage about the end of the jet creates a vacuum which tends to draw the fuel through the opening 79 and in addition greatly facili 31 by means of the branch pipes 48. The flow tate's the complete atomization thereof. The

sheld furnishes additional air which further dilutes and atomizes the carburetted fuel.

In the operation of the apparatus the solder pots are filled with solder and the burners .are operated upon a relatively light grade of oil obtained from the auxiliary reservoirs 52, the temperature of the flame being regulated by means of the fuel valves 57 and the air valves 50, until the oil in the reservoir 31 has been heated by gases by-passed through the pipe 35. The oil from the auxiliary reservoirs 52 is then shut off by means of the valves and the heated fuel oil supplied through the pipes 47 and branch pipes 48 by valves 51 and the burners regulated to give the desired degree of heat. From time to time the Weights 39 and 40 are adjusted to maintain the fuel oil at the proper temperature to secure the most efficient operation of the burners, The flames of the burners are directed underneath the solder pots and the furnace flue encloses and maintains the gases adjacent the bottom of the pots. After traveling the entire length of the pots the gases are delivered to the fine 30 and a proper part thereof utilized for heating the fuel oil in the tank 31.

It will be seen that a very economical method and apparatus has been provided for heating solder pots by means of a low grade of fuel oil which may be a by-product of oil refineries, and that the quantity of this low grade oil used is reduced to a minimum. Further the parts of the furnaces are readily removable and replaceable so that wear and breakage. may be readily repaired. Each furnace may be controlled individually and independently and all parts thereof are of rugged construction and fully capable of withstanding the rough usage to which it may be subjectec.

As various changes may be made in the above embodiment Without departing from the spirit of the invention, the description herein set forth is to be interpreted as illus trative and not in a limiting sense.

Having thus described my invention, I claim:

1. In a device of the class described, the combination of a plurality of furnaces for heating solder pots and the like, a fuel oil burner for each of said furnaces, a supply of fuel oil for said burners, and means including a by-pass for conducting a portion of the fnrnace gases into heating contact with said fuel oil.

2. In a device of the class described, the combination of a plurality of furnaces for heating solder pots and the like, a fuel oil burner for each of said furnaces, a supply of fuel oil for said burners, means for bypassing the furnace gases for heating said fuel oil, and devices for controlling the amount of gases by-passed to regulate the temperature of the fuel oil.

3. In a device of the class described, the combination of two pairs of furnaces for heating solder pots and the like, an oil burner for each of said furnaces, an oil tank for supplying fuel to said burners, a pipe extending through said tank, and means for by-passing fulrnace gases through said pipe to heat said 01 4. In a device of the class described, the combination of two pairs offurnaces for heating solder pots and the like, an oil burner for each of said furnaces, an oil tank for supplying fuel to said furnaces, a common flue for said furnaces, a pipe extending through said tank, and means for by-passing furnace gases from said flue through said pipe to heat the oil in saidtank.

5. In a device of the class described, the combination of an elongated solder pot, said pot havingoutwardly flared portions along opposite sides thereof, a supporting casing including side wall members adapted to engage said portions to support said pot, and additional supporting members carried by said side members and engaging the bottom of said pot at intervals. I

6. In a device of the class described, th combination of an elongated solder pot, said pot having outwardly flared portions along opposite sides thereof, a supporting casing adapted to engage said portions to support said pot, supporting shoulders on the innerside of said casing, and additional support ing members mounted on said shoulders to engage the bottom of said pot.

7. In a device of the class described, the combination of a furnace, an elongated solder pot mounted over said furnace, a fuel oil burner at one end of said furnace for directing a flame along said solder pot, a reservoir for supplying fuel oil to said burner, and

means for by-passing the furnace gases for heating the oil in said reservoir.

8. In a device of the class described, the combination. of a battery of furnaces for heatingsolder pots. and the like, a fuel oil burner for each of said furnaces, a common fuel reservoir for said burners, and means for bypassing the furnace gases given off by the furnaces to heat the fuel oil in said reservoir.

This specification signed this 20th day of October, 1926.

WILLIAM BEDDIE ROBERTSON. 

